Powder Burn Rate and Power Floor Question


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zetti1
May 25, 2013, 09:43 PM
I really like using 147gr 9mm FMJ RN bullets from Precision Delta, but Iíve had difficulty getting them so I ordered their 124gr bullets.

I have available to me Titegroup, Win 231 and WSF. If I loaded 10 rounds using TG, 10 rounds using Win 231 and 10 rounds using WSF and all rounds achieved a 130 PF, would I experience the same muzzle flip from all 30 rounds? I know all three powders have different burn rates, but if the PF is the same, would I experience any difference between the test rounds? Thanks in advance for your input.

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Hondo 60
May 25, 2013, 09:47 PM
would I experience the same muzzle flip from all 30 rounds

No, the slower the powder, the more felt recoil.

rodregier
May 25, 2013, 10:17 PM
My experience was the reverse, slower powder with same power factor was a longer duration recoil pattern.

I've burned a bunch of WSF in 9mmx19 for IPSC loadings with 124g projectiles.

GJSchulze
May 26, 2013, 03:21 AM
And if you consider the physics, only the velocity and mass of the bullet matter, although I suppose the mass and velocity of the ejected gases are also factors. Same PF and same weight mean same velocity, so recoil should be the same. I use 147 gr bullet so I can use less powder, resulting in a slower bullet to get a lower impulse (force/time), meaning less felt recoil.

I think these replies pretty much cover all the possibilities:rolleyes:

Blue68f100
May 26, 2013, 08:08 AM
My experience tells me the slower powder will have less recoil, shoot softer.

rcmodel
May 26, 2013, 01:04 PM
Same PF and same weight mean same velocity, so recoil should be the same.Not so.

The acceleration of the bullet is more abrupt with fast powder then with slow powder.

Both may exit the muzzle at the same velocity, but the one that is kicked in the pants harder with the fast powder to get it there will recoil with a more snappy feel.

rc

Certaindeaf
May 26, 2013, 01:39 PM
Popeye would just spit nails and build a house in the time it took you to read this.

1SOW
May 26, 2013, 03:52 PM
Both may exit the muzzle at the same velocity, but the one that is kicked in the pants harder with the fast powder to get it there will recoil with a more snappy feel.
Muzzle blast gives felt recoil. What's happening "in" the bbl is equal and opposite until the bullet exits.

Slower powders 'may' give more recoil due to more muzzle blast. Bbl length and bullet weight (rate of acceleration) matter.

As Certaindeaf said, try 'em and see.

That's why the heavier bullets ( like your 147s) give less felt recoil with fast powders, less muzzle blast.

n320 will be softest--:D:evil:

ArchAngelCD
May 27, 2013, 11:39 AM
No offense meant but wouldn't you get the best answer by shooting the ammo you have already loaded? Just askin... :D

jmorris
May 28, 2013, 10:57 AM
Yep, its you that has to live with it so you should test them all.

I have felt no 9mm load, that makes PF, that feels softer than 3.1 of VV N310 with a berrys 147 and 310 is the fastest powder I can get anymore.

It is commonly accepted in the competitive pistol shooting games that fast powders with heavy bullets are the way to go with non compensated pistols.

Running a comp is opposite, slow powders and light bullets are the way to go.

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